Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346509 | Process for dyeing hair by the sequential treatment of hair with metal ion-containing composition and with a dye composition containing 5,6-dihydroxyindole-2-carboxylic acid and certain derivatives thereof | Thomas M. Schultz, Keith C. Brown, Giuseppe Prota | 1994-09-13 |
| 5279617 | Process and kit for dyeing hair | Giuseppe Prota, Gottfried Wenke | 1994-01-18 |
| 5279618 | Process and kit for dyeing hair | Giuseppe Prota, Gottfried Wenke | 1994-01-18 |